Stop motion foe looms



3 SheetsSheet 1.

'J. J. SWITZER. STOP MOTION FOR LOOMS.

No. 80,885. Patented Aug. 11, 1868.

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3 Sheets- Sheet 2.

J. SWITZER. STOP MOTION FOR LOOMS.

Patented Aug. 11, 1868.

' 3 Sheets-Sheet 3.

J. J. SWITZER. STOP MOTION FOR LOOMS.

i No. 80,885. Patented Aug. 11, 1868.

JOHN J. SWITZER, 0F BOXBUBY, ASSIGNOR TOKHIMSELF AND'EDWIN H.

- FIT'lZ, OF NORTHBOROUGHL'MASSACHUSETTS.

Letters Patent No. 80,885, dated August 11, 1868;

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TO ALL WHOM IT MAY GONUERN: v

Be it'known that I, JOHN J. SWITZEB, of Roxbury', in the county of Nor-folk, and State of Massachusetts, have invented a new and improved Loom and I dohereby declare thatthe following is a full, clear, and exact description thereof,"which will enable others skilledin the art to make and-use the seine, reference being bad to the accompanying drawings, forming 'part of this specifieationa a Figure 1, Sheet I, represents a; verticaltransver se section ofniy improvedloom.

Figure 2, Sheet I,- he detail transverse section of the apparatus fordetaining the flat-board.

Figure 3,.Sheet II, isah end elevation of my improved loom.

Figure 4, Sheet II, is a detail vertical section of the same, taken on the plane of the line at x, fi'g. 3.

Figure 5, Sheet III, is 'a plan or top view, partlyin section, of myimproved loom.

Similarlletters of reference indicate corresponding part-s. 4

This invention relates to a new attachment to looms, which has for its object to instantly cause the stoppingof the machinery sol soon as one of the warp-threadsbreaks, as threadsfreqnently break during the weaving process, and as, by their breaking, much annoyance is caused to the weaver'and injury to the fabric, this invention will be of greatbenefit'toall manufacturers of wbolledand cotton goods;- more so, as it is easily applicable to all looms of suitable construction. I V 4 -When a'threadbreaks on fine goods, it is not always discovered at once, and "it" thc'weaving is continued, the whole fabricis spoiled,

My invention consists in a thread-detector, so arranged and applied to an ordinary or suitable loom, that at the momenta thread breaks,-the loom will-instantly-stop, and, cannot proceed until the severed thread has been repaired by the attendant. "The thread-detectoris altogether out 'cfthe way of the working parts of the loom, and does not in'thelcast interfere with the operation the same as long as ,all the threads are in order.- The invention 'consists chiefly in the use of a seriesof ,pi'voted iwings, fr om 'which warp-supporting rods '0!- threads are suspendedyon the lower ends of which loops or eyes are formed for the warp-threads to pass through. So long as the warp-sirpporting rods or suspended threads are kept tense by thewarp-threads, theyhold the wings in such a position that the same do not interfere with the motion of arising and falling flat-board, but so scenes s. warp-thread breaks, it will causethe' release of a warp-supporting r'dd or cord, and the wing from which the same is suspended will swing on its pivot, so as to bring an arm-projecting from "it in the way of the aforesaid flat-board, arresting the downward motion of the same. I The flat-board, when'arrested, will cause a shaft, that'tnoves also up and down,;to oscillate, and by this oscillating motion-of the shaft, alever will be moved,

which, by means of cords, a sliding frame, andstop,-'an'd bell-crank leven'as hereinafter particularly described,

is connected with the s lidingrod which operatesthe belt'sliii't'ing lever. As soon as the said rod. is released, by

the withdrawal of the stop, it will, by the action of a spring or, weight, be movcd, so as to shift the belt-"to a loose pulley, and to thus stop the loom. On the1shifting-rod is also a stop, which, as soon as the rod is moved bythe spring, comcsinto thsway'of the batten, and immediately arrests the motion of the same.

Thus, whenever-a thread breaks, the motion of the loom is immediately arresteda A, in the drawing,'i'cpresents the frame of aloom of ordinary orsuitabloconstruction.

B is'the main driving-shaft arranged in the same, which, by means of suitable connecting-rods a a, imparts oscillating motion tothebatten-framo G, which is suspended in the ordinary or'in suitable'manner,

-- D D are the harness-frames, arranged as usual, and provided with'hcddles b b.- The harness-frames are moved by means of earns a c, on 'a'shaft, E, which receives rotary motion, bygeari ng or other connection, from the shaft 13. All these parts A B O D E, 'and a be, as well as their various connections and appendages, are of ordinary or suitable construction, and do not form' part of'thi's' invention.

On the shaft 13 are mounted two cams da,.upon the edgaot whichrest the lower ends of vertically-sliding bars-F, .therotar y motion of the cams imparting tbe'reciprocating motion'to the bars. ,The lower ends of the bars carry rollers e, which serve to lessen the friction produced on the edges of the cams. The upper ends of the bars Fiare connected by means of a horizontal shaft or rod, G. Upon shoulders ff, formed on bars F F. rests and is supported a flat-board, II, which rises and falls with the bars F, said flat-board being hclowthe. shaft G, as isshown in fig. 1. v

The fiat-board, instead of being made of one piece, may he made of two or more independent pieces, as may be desired.

The shaft B receives its motion from a belt, running on a pulley, g, a forked lever, I, serving to shift the belt upon 0. loose pulley, Ir, shown in fig. 5.

The lover I is pivoted to the frame of the loom, and'its rear end is connected with a sliding bar, J, which is moved longitudinally in its bearings, sons to swing the lever I on its pivot; and thus, by sliding the bar J, the belt can be shifted to the loose or fixed pulley, as may be desired, to stop or start the machine.

K K are a series of sheet-metal or other plates, pivoted to horizontal shafts L, having their bearings in the framed the loom, under and parallel with the flat-board H.

The wings K have each threo arms, 2', j, and l.

From the arm i is suspended'a cord or string, m, which has at its lower end an eye or loop, through which another cord, 1:, is drawn, both endsof which have loops 0 0, as in fig. 1. Each warp-thread passes through a loop, 0, and as the warp-threads are held,tcnse, theywill also hold the cords m n tense, and thereby the arms 13 of the wings down. l

The cords n may be dispensed with, and the warp-threads be drawn directly through the loop at the lower ends of the threads m, but in that case a thread, m, would be required for each warp-thread, while, with the threads at, but one thread 112. for a pair of warp-threads is required. Instead of the threads m, rods or wires may becmployed. 4

' The arms 3' of the wings'K extend upwards, as in fig. 1, and are, when the flat-boardmoves down, swung down by the said flat-board, as shown by red lines in fig. 1, as hereinafter more fully set forth. The arms I of the wings K, act as weights to keep the'strings m tense, and the arms a and j up, so that when the flat-board moves up, the wings will at once resume their original position.

Should one of the warp-threads break, the weight I of the wing with which such warp-thread was connected will-at once cause the arm j of the wing to assume a vertical position above the shaft L, as shown on the lefthand side of fig. 2. Q I

When, then, the flat-board comes down, it will, by the-thus elevated arm j, be prevented from descending to the shoulders), while the downward motion. of the bars F, aid of the shaft G, will not bearrested. When the flat-board is thus held up by a wing, K, while the shaft Grooves downwards, projecting lugs, p, on the shaft,

. will strike against lugs 1-, projecting from the flat-board, and the shaftlwill thereby be .turned,'as indicated in fig. 2 The projection 12 was, before the shaft G came in contact with the flat-board, hold in a horizontal position by a suitable'spring or weight, a, as in fig. 1, and 'is then turned up, as in fig. 2, whereby the turd-lug of the shaft G is produced.

From the above it will be fully understood that whenever a warp-thread breaks, the shaft G will at once be turned by the arrested flat-board.

The wings K may be arranged difi'erontly, and I do not confine myself to the particular shape or form, but simply to their being so arranged, and provided either with weights'or springs, that they will, as soon as their conneetions'with thewanp-threads are interrupted by the breaking of a warp-thread, at once swing on their pivots, and arrest the flat-board, as set forth. p

I M is a lever or bar, hinged to one side of the frame A, and connected'at its free end by means of a cord, at, with a pin, a, as shown in fig. 3. The pin v has as its lower end a; block, 10, as in fig. 4. l

N is an elbow-crank, pivoted to the frame A, and connected at one end with the sliding bar J, while its other end is, by means of a string, 1, connected with the frame 0, sliding in a stationary case, P, in front of the pin 11, as indicated'in fig. 4. I p V In the frame Ois pivoted, or otherwise arranged, a hook, 2, as shown in fig. 4,, which hook has a. cam-shaped projection, a, atrit inner edge, opposite the pin v. v

b is a cam, mounted on the shaft B, and oscillating a lever, It, pivoted to the-frame A, as in fig. 3. The lever R carries a sliding block, S, up and down in front of the hook is.

When the frame 0 is elevated, as in fig. 4, and the hook drown in, the slide J will be in the position shown in fig. 5, holding the lever I on the fixed pulley, a spring, c, tending to retain the slide in this position.

' As soon as the shaft G is turned, it will, with a crank cream, (1, at its end,-swiug,the lever M on its pivot, so that the same will draw the eord't, which will raise the pin 1). As the pin is raised, its block, w, will strike against the projection 11 of'the hook z, and will push the book out into the way of the slide S. As soon as the slide S is now moved'dewn by the action of the com 6 and lever B, it will carry the frame 0 down with it, and the frame O will draw the string :1 and will turn the bell-crank N on its pivot, so as to draw the slideJtowards the crank. By such motion of the slide J, the lever I will be turned, and will shift the belt upon the loose pulley.

The connection between the shaft G and the slide J may be arranged in a different manner from that described, although the latter is quite simple, and operates satisfactorily.

'1 represents a; swinging plate, held by a spring, e. The rod J, by means of which the shifting-lever I is operated, is provided with a projecting pin,f, which rests against the plate When the rod J is moved, to shift the belt from pulley g to h, the pin f is withdrawn from the plate '1, which, by the contraction of the spring e, is caused to assume the position shown in red lines. The plate T istlien in the way of a pin, 9', pro jectingfrom the under side of the batten C, and will thus also at once arrest the motion of the batte n. When the broken thread has heed adjusted, the pin '0 must or may be pushed down, the hook z pushed in, and the slide J reodjusted,,.when ,th arts will all be agnin in working position.

3 amass To prevent the threads in from getting entangled, they had better be guided through a horizontal reed, u, as is clearly shown in fig. 1.

The iever R is, by means of the cum I) on the shaft 13, or on any other shaft, moved down, and is raised again by means of a spring, h, or its equivalent.

Instead of all the springs herein mentioned, weightsmay be used, and in place of all the weights mentioned, springs-may be employed, as may be desired.

The driving-shaft receives its motion from suitable mechanism.

I claim as new, and desire to secure by LettersPatenv- 1. The wings K K, constructed substantially as described, and rovided with the warp-supporting cords or rods, in combination with the rising-.andfaliing board, as and for the purpose set forth.

2. The flat-board H, the vertically-movable frame F, and the wings K, as and for thepnrposo sctiforth.

3. The vertically-movable frame F, carrying the flat-board H and the shaft G, substantially as herein shown and described.

4. The lugs 1;, projecting from the flat-board, in combination with the lugs 11, projecting from the rock-shaft all made and operating substantially as and for the. purpose herein shown and described.

" 5. The slide J, connected. with the shifting-lever 1, spring 0', and elbow-crank N, substantially as hereinsho'wn and described.

The devices herein shown and described, for transferring motion from the rock-shaft-G to thcelbowcrank N, said devices consisting of the lever M, cord t, pin 1), hook 2, frame 0, and string y, all made and oporsting-substantially as herein shown and described, in combination with the vibrating-lever R and block S, made as set forth.

7. A thread-detector, consisting of the wings K K, threads m, frame F, shaft G, fiat-board H, lugs 11 r, cam 01, lever M, string t, pin 'u, hook z, frame 0, cord y, elbow N, slide J, and shifting-lever I, all made and operating substantially as herein shown and described. V

8. The swinging arm M, cord at, pin 1;, and block 20,- in combination with the hook 2, having the inner proiection a, and hinged in the frame 0, and combined with the slide S, all made as set forth.

The above specification of my invention signed by me, this 12th day of March, 1868.

JOHN J. SWITZER.

Witnesses:

WMVF. MGNAMARA, Anax. F. Rossnrs. 

